No office rate
Both codes concern major-vessel repair; select 33320 when cardiopulmonary bypass is used and 33321 when it is not.
On this page
CMS RVU26D · Effective 2026-10-01
33320 Major vessel repair Medicare reimbursement rates in Maryland
Report this code when a surgeon repairs a major cardiovascular vessel during an operation performed with cardiopulmonary bypass. Compare 33320 office and facility rates across CMS payment localities in Maryland.
Amounts below use the non-QP conversion factor for participating physicians. These are base physician payments before claim-level adjustments, not patient costs or total hospital charges.
What does Medicare pay for 33320 in Maryland?
Maryland has 3 payment localities in this comparison. Use the service location to choose the applicable amount. These are the supported base rates for the 3 payment areas shown below, using the same CMS release.
Office / nonfacility
No supported rate
Facility setting
$1014.11–$1113.73
3 of 3 localities have a supported rate.
These are locality ranges, not averages or address-specific quotes. A facility-setting amount covers the physician service; it does not include a hospital’s separate bill. Choose a locality below to inspect its calculation, compare other payment areas, or price a percentage of Medicare.
Where 33320 pays more and less in Maryland
Cardiac surgery
About 33320: Major vessel repair with bypass
Report this code when a surgeon repairs a major cardiovascular vessel during an operation performed with cardiopulmonary bypass.
This code describes operative repair of a major blood vessel, such as the aorta or pulmonary artery, when cardiopulmonary bypass is used. Cardiothoracic surgeons typically perform the service in a hospital operating room. The operative report should identify the vessel and the repair performed; the use of bypass distinguishes this service from a comparable repair performed without it.
Choose the code based on the actual vessel procedure and whether cardiopulmonary bypass was used. Documentation should support the vessel involved, the repair technique, and bypass use. This major surgery has a 90-day global period, including the day-before preoperative visit and related postoperative care during that period. When multiple procedures are performed in the same session, the highest-valued procedure is paid in full and other procedures are subject to the standard multiple-procedure reduction. An assistant at surgery may be paid; co-surgeon payment requires supporting documentation, and team surgery is not permitted. Modifier 50 is inappropriate for this service.
CMS billing rules for 33320
- Global period
- Major surgery with a 90-day global period: the day-before preoperative visit and 90 days of related postoperative care are included.
- Multiple procedures
- Standard multiple procedure reduction: the highest-valued procedure is paid in full and others at 50% when performed in the same session.
- Bilateral procedures
- Bilateral adjustment does not apply; the descriptor or anatomy makes modifier 50 inappropriate.
- Assistant at surgery
- Assistant at surgery may be paid.
- Co-surgeons
- Co-surgeons paid only with supporting documentation.
- Team surgery
- Team surgery not permitted.
Where the value comes from
- Work RVU18.08 · 59%
- Practice expense (office) RVU7.83 · 26%
- Malpractice RVU4.55 · 15%
79
Medicare services in 2024 · #5062 by national volume
This summary was written with AI assistance from CMS physician fee schedule data and checked against the CMS billing rules shown here. Rates on this page come directly from CMS files.
33320 compared with similar codes
Office rates for Maryland, from the same CMS release.
No office rate
33320 describes vessel repair with bypass. Consider 33330 when the operative service is insertion of a major-vessel graft.
No office rate
33335 is in the major-vessel graft insertion family. Use the code matching the documented graft service rather than coding graft insertion as vessel repair.
Compare 33320 by payment locality
Find the payment area for your service address, then open its rate page for calculation inputs, release history and the percentage-of-Medicare tool. A city may cross payment-area boundaries; the ZIP lookup above helps resolve the location.
3 of 3 payment localities
Baltimore/Surr. Cntys →
Office / nonfacility
Unavailable
Facility
$1082.16
Dc + Md/Va Suburbs →
Office / nonfacility
Unavailable
Facility
$1113.73
Rest Of Maryland →
Office / nonfacility
Unavailable
Facility
$1014.11
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33320 billing questions
How does this code differ from 33321?
This code is for major-vessel repair with cardiopulmonary bypass. Code 33321 describes the corresponding repair without bypass.
Should this code be used when a graft is inserted?
Compare the operative service with the major-vessel graft codes, including 33330 and 33335. Those codes describe graft insertion; this code describes vessel repair with bypass.
Can an assistant surgeon be reported?
CMS indicates that assistant-at-surgery payment may be made. Co-surgeon payment requires supporting documentation.
Can modifier 50 be used for repair of two vessels?
No. Modifier 50 is inappropriate for this code under the CMS bilateral rule. Report the service supported by the operative documentation.
What postoperative care is included?
The 90-day global period includes the day-before preoperative visit and 90 days of related postoperative care.
How are other procedures in the same session paid?
The highest-valued procedure is paid in full, and other procedures are subject to the standard multiple-procedure reduction.
Where these rates come from
FeeBase calculates base physician payments from CMS work, practice-expense, and malpractice RVUs, adjusted by each locality’s geographic indices and the applicable conversion factor. Unavailable or separately priced services are labeled rather than assigned a made-up amount.
Source: RVU26D. Effective 2026-10-01 through the day before 2027-01-01.
3,91433310,,Exploratory heart surgery,A,,19.83,9.25,NA,9.25,,4.75,33.83,33.83,0,090,0.09,0.84,0.07,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
3,91533315,,Exploratory heart surgery,A,,34.13,10.92,NA,10.92,,8.35,53.40,53.40,0,090,0.09,0.84,0.07,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
3,9163331F,,Bk imaging tst not ordered,I,,0.00,0.00,,0.00,,0.00,0.00,0.00,9,XXX,0.00,0.00,0.00,9,9,9,9,9,9,,33.4009,09,0,99,0.00,0.00,0.00
3,91733320,,Repair major blood vessel(s),A,,18.08,7.83,NA,7.83,,4.55,30.46,30.46,0,090,0.09,0.84,0.07,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
3,91833321,,Repair major vessel,A,,20.29,9.10,NA,9.10,,4.86,34.25,34.25,0,090,0.09,0.84,0.07,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
3,91933322,,Repair major blood vessel(s),A,,23.81,10.03,NA,10.03,,5.93,39.77,39.77,0,090,0.09,0.84,0.07,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00
3,92033330,,Insert major vessel graft,A,,24.66,10.25,NA,10.25,,5.91,40.82,40.82,0,090,0.09,0.84,0.07,2,0,2,1,0,9,,33.4009,09,0,99,0.00,0.00,0.00